SirWilliam Henry MahoneyChristie was the son of ProfessorS. H.Christie.2 He married Mary VioletteHickman, daughter of SirAlfredHickman, 1st Bt. and Lucy OwenSmith, on 13 December 1881.1 He died on 22 January 1922.2 He was invested as a Fellow, Royal Astronomical Society (F.R.A.S.).1 He held the office of Astronomer Royal.1 He was invested as a Knight Commander, Order of the Bath (K.C.B.).1 He was invested as a Fellow, Royal Society (F.R.S.).1